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公开(公告)号:US4686081A
公开(公告)日:1987-08-11
申请号:US865472
申请日:1986-05-21
申请人: Kiyoshi Takashima , Isao Suzuki , Masashi Yoshida , Ryutatsu Tanaka , Noriyuki Masumitsu , Kazuhiro Kinoshita , Hiromi Ishii
发明人: Kiyoshi Takashima , Isao Suzuki , Masashi Yoshida , Ryutatsu Tanaka , Noriyuki Masumitsu , Kazuhiro Kinoshita , Hiromi Ishii
CPC分类号: C21C7/0006 , C22C33/04
摘要: A method of adding a low-melting point metal (e.g. Pb or Bi) to liquid steel for producing a free-cutting steel in a consistent manner and in high yield of addition is disclosed. In accordance with the method, at least one member selected from said low-melting point metal and an oxide thereof, and at least one member selected from the group consisting of quick lime and a carbonaceous material are mixed in specified optimum proportions and the mixture is blown into the liquid steel through an injection lance. The liquid steel may be agitated while the mixture is added, and the appropriate conditions for the agitation of the steel are also specified.
摘要翻译: 公开了一种将低熔点金属(例如Pb或Bi)以一致的方式和高产率的添加用于生产易切削钢的液态钢的方法。 根据该方法,从规定的最佳比例混合选自所述低熔点金属及其氧化物中的至少一种,以及选自生石灰和碳质材料中的至少一种,混合物为 通过注射枪吹入液态钢。 在加入混合物的同时可以搅拌液态钢,并且还规定了钢的搅拌的适当条件。
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公开(公告)号:US5868817A
公开(公告)日:1999-02-09
申请号:US571859
申请日:1996-07-15
申请人: Masataka Yano , Yuji Ogawa , Masayuki Arai , Fumio Koizumi , Noriyuki Masumitsu , Hideaki Sasaki , Hiroshi Hirata , Yoshiaki Kusano , Hirobumi Maede, deceased , by Noriko Kawai , by Keiko Ikemizu
发明人: Masataka Yano , Yuji Ogawa , Masayuki Arai , Fumio Koizumi , Noriyuki Masumitsu , Hideaki Sasaki , Hiroshi Hirata , Yoshiaki Kusano , Hirobumi Maede, deceased , by Noriko Kawai , by Keiko Ikemizu
摘要: The present invention provides a process for efficiently dephosphorizing, dephosphorizing and decarbonizing, or desulfurizing, dephosphorizing and decarbonizing a hot metal in a converter. The amount of flux to be charged and the amount of bottom-blown gas are adjusted so that the bottom-blowing agitation power and the CaO/SiO.sub.2 ratio subsequent to the treatment become at least 0.1 kW/ton and from 0.7 to 2.5, respectively and the hot metal temperature at the treatment end point becomes from 1,200.degree. to 1,450.degree. C. Furthermore, the operation of the process is controlled so that the sum of a T.Fe concentration and a MnO concentration in the slag subsequent to the treatment becomes from 10 to 35% by weight by adjusting the top-blown oxygen feed rate, the flow rate of bottom-blown gas or the top-blowing lance height.
摘要翻译: PCT No.PCT / JP94 / 01070 Sec。 371日期:1996年7月15日 102(e)1996年7月15日PCT 1994年6月30日PCT公布。 公开号WO95 / 01458 日期1995年1月12日本发明提供了一种在转化器中有效脱磷脱磷脱碳脱硫脱硫脱碳脱碳的方法。 对被充电的通量和底吹气体的量进行调节,使得处理后的底吹搅拌力和CaO / SiO 2比分别变得至少为0.1kW / ton和0.7至2.5, 处理终点处的铁水温度为1200〜1450℃。此外,控制处理的操作,使得处理后的炉渣中的T.Fe浓度与MnO浓度的和变为 10至35重量%,通过调节最高的氧气进料速率,底吹气体的流量或顶吹喷枪的高度。
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